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f946270d05
We had a number of bugs in the past because developers forgot to fully test dumps, which pass NULL as info to .prepare_data. .prepare_data implementations would try to access info->extack leading to a null-deref. Now that dumps and notifications can access struct genl_info we can pass it in, and remove the info null checks. Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com> # pause Reviewed-by: Jiri Pirko <jiri@nvidia.com> Link: https://lore.kernel.org/r/20230814214723.2924989-11-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
379 lines
15 KiB
C
379 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include "netlink.h"
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#include "common.h"
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struct coalesce_req_info {
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struct ethnl_req_info base;
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};
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struct coalesce_reply_data {
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struct ethnl_reply_data base;
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struct ethtool_coalesce coalesce;
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struct kernel_ethtool_coalesce kernel_coalesce;
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u32 supported_params;
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};
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#define COALESCE_REPDATA(__reply_base) \
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container_of(__reply_base, struct coalesce_reply_data, base)
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#define __SUPPORTED_OFFSET ETHTOOL_A_COALESCE_RX_USECS
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static u32 attr_to_mask(unsigned int attr_type)
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{
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return BIT(attr_type - __SUPPORTED_OFFSET);
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}
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/* build time check that indices in ethtool_ops::supported_coalesce_params
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* match corresponding attribute types with an offset
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*/
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#define __CHECK_SUPPORTED_OFFSET(x) \
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static_assert((ETHTOOL_ ## x) == \
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BIT((ETHTOOL_A_ ## x) - __SUPPORTED_OFFSET))
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__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS);
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__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES);
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__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_IRQ);
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__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_IRQ);
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__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS);
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__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES);
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__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_IRQ);
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__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_IRQ);
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__CHECK_SUPPORTED_OFFSET(COALESCE_STATS_BLOCK_USECS);
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__CHECK_SUPPORTED_OFFSET(COALESCE_USE_ADAPTIVE_RX);
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__CHECK_SUPPORTED_OFFSET(COALESCE_USE_ADAPTIVE_TX);
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__CHECK_SUPPORTED_OFFSET(COALESCE_PKT_RATE_LOW);
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__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_LOW);
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__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_LOW);
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__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_LOW);
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__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_LOW);
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__CHECK_SUPPORTED_OFFSET(COALESCE_PKT_RATE_HIGH);
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__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_HIGH);
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__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_HIGH);
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__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_HIGH);
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__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_HIGH);
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__CHECK_SUPPORTED_OFFSET(COALESCE_RATE_SAMPLE_INTERVAL);
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const struct nla_policy ethnl_coalesce_get_policy[] = {
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[ETHTOOL_A_COALESCE_HEADER] =
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NLA_POLICY_NESTED(ethnl_header_policy),
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};
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static int coalesce_prepare_data(const struct ethnl_req_info *req_base,
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struct ethnl_reply_data *reply_base,
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const struct genl_info *info)
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{
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struct coalesce_reply_data *data = COALESCE_REPDATA(reply_base);
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struct net_device *dev = reply_base->dev;
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int ret;
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if (!dev->ethtool_ops->get_coalesce)
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return -EOPNOTSUPP;
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data->supported_params = dev->ethtool_ops->supported_coalesce_params;
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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return ret;
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ret = dev->ethtool_ops->get_coalesce(dev, &data->coalesce,
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&data->kernel_coalesce,
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info->extack);
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ethnl_ops_complete(dev);
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return ret;
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}
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static int coalesce_reply_size(const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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return nla_total_size(sizeof(u32)) + /* _RX_USECS */
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nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES */
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nla_total_size(sizeof(u32)) + /* _RX_USECS_IRQ */
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nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_IRQ */
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nla_total_size(sizeof(u32)) + /* _TX_USECS */
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nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES */
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nla_total_size(sizeof(u32)) + /* _TX_USECS_IRQ */
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nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_IRQ */
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nla_total_size(sizeof(u32)) + /* _STATS_BLOCK_USECS */
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nla_total_size(sizeof(u8)) + /* _USE_ADAPTIVE_RX */
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nla_total_size(sizeof(u8)) + /* _USE_ADAPTIVE_TX */
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nla_total_size(sizeof(u32)) + /* _PKT_RATE_LOW */
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nla_total_size(sizeof(u32)) + /* _RX_USECS_LOW */
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nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_LOW */
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nla_total_size(sizeof(u32)) + /* _TX_USECS_LOW */
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nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_LOW */
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nla_total_size(sizeof(u32)) + /* _PKT_RATE_HIGH */
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nla_total_size(sizeof(u32)) + /* _RX_USECS_HIGH */
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nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_HIGH */
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nla_total_size(sizeof(u32)) + /* _TX_USECS_HIGH */
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nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_HIGH */
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nla_total_size(sizeof(u32)) + /* _RATE_SAMPLE_INTERVAL */
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nla_total_size(sizeof(u8)) + /* _USE_CQE_MODE_TX */
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nla_total_size(sizeof(u8)) + /* _USE_CQE_MODE_RX */
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nla_total_size(sizeof(u32)) + /* _TX_AGGR_MAX_BYTES */
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nla_total_size(sizeof(u32)) + /* _TX_AGGR_MAX_FRAMES */
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nla_total_size(sizeof(u32)); /* _TX_AGGR_TIME_USECS */
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}
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static bool coalesce_put_u32(struct sk_buff *skb, u16 attr_type, u32 val,
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u32 supported_params)
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{
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if (!val && !(supported_params & attr_to_mask(attr_type)))
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return false;
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return nla_put_u32(skb, attr_type, val);
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}
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static bool coalesce_put_bool(struct sk_buff *skb, u16 attr_type, u32 val,
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u32 supported_params)
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{
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if (!val && !(supported_params & attr_to_mask(attr_type)))
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return false;
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return nla_put_u8(skb, attr_type, !!val);
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}
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static int coalesce_fill_reply(struct sk_buff *skb,
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const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct coalesce_reply_data *data = COALESCE_REPDATA(reply_base);
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const struct kernel_ethtool_coalesce *kcoal = &data->kernel_coalesce;
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const struct ethtool_coalesce *coal = &data->coalesce;
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u32 supported = data->supported_params;
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if (coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS,
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coal->rx_coalesce_usecs, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES,
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coal->rx_max_coalesced_frames, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_IRQ,
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coal->rx_coalesce_usecs_irq, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ,
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coal->rx_max_coalesced_frames_irq, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS,
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coal->tx_coalesce_usecs, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES,
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coal->tx_max_coalesced_frames, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_IRQ,
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coal->tx_coalesce_usecs_irq, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ,
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coal->tx_max_coalesced_frames_irq, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_STATS_BLOCK_USECS,
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coal->stats_block_coalesce_usecs, supported) ||
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coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX,
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coal->use_adaptive_rx_coalesce, supported) ||
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coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX,
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coal->use_adaptive_tx_coalesce, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_PKT_RATE_LOW,
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coal->pkt_rate_low, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_LOW,
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coal->rx_coalesce_usecs_low, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW,
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coal->rx_max_coalesced_frames_low, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_LOW,
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coal->tx_coalesce_usecs_low, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW,
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coal->tx_max_coalesced_frames_low, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_PKT_RATE_HIGH,
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coal->pkt_rate_high, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_HIGH,
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coal->rx_coalesce_usecs_high, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH,
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coal->rx_max_coalesced_frames_high, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_HIGH,
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coal->tx_coalesce_usecs_high, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH,
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coal->tx_max_coalesced_frames_high, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL,
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coal->rate_sample_interval, supported) ||
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coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_CQE_MODE_TX,
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kcoal->use_cqe_mode_tx, supported) ||
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coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_CQE_MODE_RX,
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kcoal->use_cqe_mode_rx, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_AGGR_MAX_BYTES,
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kcoal->tx_aggr_max_bytes, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_AGGR_MAX_FRAMES,
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kcoal->tx_aggr_max_frames, supported) ||
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coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_AGGR_TIME_USECS,
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kcoal->tx_aggr_time_usecs, supported))
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return -EMSGSIZE;
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return 0;
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}
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/* COALESCE_SET */
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const struct nla_policy ethnl_coalesce_set_policy[] = {
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[ETHTOOL_A_COALESCE_HEADER] =
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NLA_POLICY_NESTED(ethnl_header_policy),
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[ETHTOOL_A_COALESCE_RX_USECS] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_RX_MAX_FRAMES] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_RX_USECS_IRQ] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_USECS] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_MAX_FRAMES] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_USECS_IRQ] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_STATS_BLOCK_USECS] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX] = { .type = NLA_U8 },
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[ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX] = { .type = NLA_U8 },
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[ETHTOOL_A_COALESCE_PKT_RATE_LOW] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_RX_USECS_LOW] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_USECS_LOW] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_PKT_RATE_HIGH] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_RX_USECS_HIGH] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_USECS_HIGH] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX] = NLA_POLICY_MAX(NLA_U8, 1),
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[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX] = NLA_POLICY_MAX(NLA_U8, 1),
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[ETHTOOL_A_COALESCE_TX_AGGR_MAX_BYTES] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_AGGR_MAX_FRAMES] = { .type = NLA_U32 },
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[ETHTOOL_A_COALESCE_TX_AGGR_TIME_USECS] = { .type = NLA_U32 },
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};
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static int
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ethnl_set_coalesce_validate(struct ethnl_req_info *req_info,
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struct genl_info *info)
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{
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const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
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struct nlattr **tb = info->attrs;
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u32 supported_params;
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u16 a;
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if (!ops->get_coalesce || !ops->set_coalesce)
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return -EOPNOTSUPP;
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/* make sure that only supported parameters are present */
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supported_params = ops->supported_coalesce_params;
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for (a = ETHTOOL_A_COALESCE_RX_USECS; a < __ETHTOOL_A_COALESCE_CNT; a++)
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if (tb[a] && !(supported_params & attr_to_mask(a))) {
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NL_SET_ERR_MSG_ATTR(info->extack, tb[a],
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"cannot modify an unsupported parameter");
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return -EINVAL;
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}
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return 1;
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}
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static int
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__ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info,
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bool *dual_change)
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{
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struct kernel_ethtool_coalesce kernel_coalesce = {};
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struct net_device *dev = req_info->dev;
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struct ethtool_coalesce coalesce = {};
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bool mod_mode = false, mod = false;
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struct nlattr **tb = info->attrs;
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int ret;
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ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
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info->extack);
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if (ret < 0)
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return ret;
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/* Update values */
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ethnl_update_u32(&coalesce.rx_coalesce_usecs,
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tb[ETHTOOL_A_COALESCE_RX_USECS], &mod);
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ethnl_update_u32(&coalesce.rx_max_coalesced_frames,
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tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES], &mod);
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ethnl_update_u32(&coalesce.rx_coalesce_usecs_irq,
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tb[ETHTOOL_A_COALESCE_RX_USECS_IRQ], &mod);
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ethnl_update_u32(&coalesce.rx_max_coalesced_frames_irq,
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tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ], &mod);
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ethnl_update_u32(&coalesce.tx_coalesce_usecs,
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tb[ETHTOOL_A_COALESCE_TX_USECS], &mod);
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ethnl_update_u32(&coalesce.tx_max_coalesced_frames,
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tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES], &mod);
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ethnl_update_u32(&coalesce.tx_coalesce_usecs_irq,
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tb[ETHTOOL_A_COALESCE_TX_USECS_IRQ], &mod);
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ethnl_update_u32(&coalesce.tx_max_coalesced_frames_irq,
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tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ], &mod);
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ethnl_update_u32(&coalesce.stats_block_coalesce_usecs,
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tb[ETHTOOL_A_COALESCE_STATS_BLOCK_USECS], &mod);
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ethnl_update_u32(&coalesce.pkt_rate_low,
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tb[ETHTOOL_A_COALESCE_PKT_RATE_LOW], &mod);
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ethnl_update_u32(&coalesce.rx_coalesce_usecs_low,
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tb[ETHTOOL_A_COALESCE_RX_USECS_LOW], &mod);
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ethnl_update_u32(&coalesce.rx_max_coalesced_frames_low,
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tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW], &mod);
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ethnl_update_u32(&coalesce.tx_coalesce_usecs_low,
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tb[ETHTOOL_A_COALESCE_TX_USECS_LOW], &mod);
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ethnl_update_u32(&coalesce.tx_max_coalesced_frames_low,
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tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW], &mod);
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ethnl_update_u32(&coalesce.pkt_rate_high,
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tb[ETHTOOL_A_COALESCE_PKT_RATE_HIGH], &mod);
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ethnl_update_u32(&coalesce.rx_coalesce_usecs_high,
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tb[ETHTOOL_A_COALESCE_RX_USECS_HIGH], &mod);
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ethnl_update_u32(&coalesce.rx_max_coalesced_frames_high,
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tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH], &mod);
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ethnl_update_u32(&coalesce.tx_coalesce_usecs_high,
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tb[ETHTOOL_A_COALESCE_TX_USECS_HIGH], &mod);
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ethnl_update_u32(&coalesce.tx_max_coalesced_frames_high,
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tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH], &mod);
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ethnl_update_u32(&coalesce.rate_sample_interval,
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tb[ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL], &mod);
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ethnl_update_u32(&kernel_coalesce.tx_aggr_max_bytes,
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tb[ETHTOOL_A_COALESCE_TX_AGGR_MAX_BYTES], &mod);
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ethnl_update_u32(&kernel_coalesce.tx_aggr_max_frames,
|
|
tb[ETHTOOL_A_COALESCE_TX_AGGR_MAX_FRAMES], &mod);
|
|
ethnl_update_u32(&kernel_coalesce.tx_aggr_time_usecs,
|
|
tb[ETHTOOL_A_COALESCE_TX_AGGR_TIME_USECS], &mod);
|
|
|
|
/* Update operation modes */
|
|
ethnl_update_bool32(&coalesce.use_adaptive_rx_coalesce,
|
|
tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX], &mod_mode);
|
|
ethnl_update_bool32(&coalesce.use_adaptive_tx_coalesce,
|
|
tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX], &mod_mode);
|
|
ethnl_update_u8(&kernel_coalesce.use_cqe_mode_tx,
|
|
tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX], &mod_mode);
|
|
ethnl_update_u8(&kernel_coalesce.use_cqe_mode_rx,
|
|
tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX], &mod_mode);
|
|
|
|
*dual_change = mod && mod_mode;
|
|
if (!mod && !mod_mode)
|
|
return 0;
|
|
|
|
ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
|
|
info->extack);
|
|
return ret < 0 ? ret : 1;
|
|
}
|
|
|
|
static int
|
|
ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info)
|
|
{
|
|
bool dual_change;
|
|
int err, ret;
|
|
|
|
/* SET_COALESCE may change operation mode and parameters in one call.
|
|
* Changing operation mode may cause the driver to reset the parameter
|
|
* values, and therefore ignore user input (driver does not know which
|
|
* parameters come from user and which are echoed back from ->get).
|
|
* To not complicate the drivers if user tries to change both the mode
|
|
* and parameters at once - call the driver twice.
|
|
*/
|
|
err = __ethnl_set_coalesce(req_info, info, &dual_change);
|
|
if (err < 0)
|
|
return err;
|
|
ret = err;
|
|
|
|
if (ret && dual_change) {
|
|
err = __ethnl_set_coalesce(req_info, info, &dual_change);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
const struct ethnl_request_ops ethnl_coalesce_request_ops = {
|
|
.request_cmd = ETHTOOL_MSG_COALESCE_GET,
|
|
.reply_cmd = ETHTOOL_MSG_COALESCE_GET_REPLY,
|
|
.hdr_attr = ETHTOOL_A_COALESCE_HEADER,
|
|
.req_info_size = sizeof(struct coalesce_req_info),
|
|
.reply_data_size = sizeof(struct coalesce_reply_data),
|
|
|
|
.prepare_data = coalesce_prepare_data,
|
|
.reply_size = coalesce_reply_size,
|
|
.fill_reply = coalesce_fill_reply,
|
|
|
|
.set_validate = ethnl_set_coalesce_validate,
|
|
.set = ethnl_set_coalesce,
|
|
.set_ntf_cmd = ETHTOOL_MSG_COALESCE_NTF,
|
|
};
|